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Avatar for OKCPowerCare
OKCPowerCare
5.0(
23
)

Serving Duncan, OK and surrounding areas

In business since 2025

Free estimates

Emergency services offered

"We had a generator and home surge protector installed. They were prompt, polite, and efficient. They showed us how to program/use the generator, cleaned up, etc. I definitely recommend OKCPowerCare."
Generator Install
Generator Install
Response time7 hrs
GENERATOR SUPERCENTER
4.2(
36
)

Serving Duncan, OK and surrounding areas

In business since 1980

Free estimates

Credit card accepted

"The electricians and plumbers were very professional in their demeanor. They worked as a team, everyone knew what to do and how to do it. They answered all my questions, but didn't let that distract them from their job. I was impressed with the speed of the installation. They cleaned up after themselves and took their trash with them."
Response time3 days
Recommended by100%of homeowners
Avatar for Urner Electric
Urner Electric
4.1(
11
)

Serving Duncan, OK and surrounding areas

In business since 2019

Free estimates

Emergency services offered

"We needed 2 ceiling fans installed, so I looked on Angie's List and sent a msg to 3 different electricians I found on here. They were the first to respond within 1-2hrs. I sent my msg on our way to church service and when it was over, I noticed they responded. They were on time, professional, and polite. I would highly recommend them and will definitely reach out to them again if we need any other electrical work."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+17

Recommended by87%of homeowners
Avatar for Crossed Wire Electric, LLC
Crossed Wire Electric, LLC
4.1(
9
)

Serving Duncan, OK and surrounding areas

In business since 2025

Free estimates

Emergency services offered

"Chris and his team did a amazing job🙏🤩. I had bunch of electrical issues in my house. They did everything I asked for 🥰😍. He and his team professional also polite and respectful. I am amazed how they really care for their customer. Did amazing jobs and price I can afford. I am so grateful for you guys🥰. I will call you guys again and again."
1 neighbors recently requested a quote
Avatar for The Home Depot - Generators
The Home Depot - Generators
2.5(
1
)

Serving Duncan, OK and surrounding areas

In business since 2003

Free estimates

Small jobs welcome

Today, we're proud to be the world's largest home improvement retailer. In 2,300 stores across North America, we aspire to excel in service – to our customers, associates, communities and shareholders. That's what leadership means to us. That's The Home Depot difference.

Generators
Generators
Generators
Generator
Generators

+5

Avatar for Ugle Ann Electric
Ugle Ann Electric
New to Angi

Serving Duncan, OK and surrounding areas

Free estimates

Emergency services offered

Warranties offered

I’m Trevor, a 3rd generation electrician with 25+ years of hands-on experience across residential, commercial, and industrial work. After decades of troubleshooting everything from quirky outlets to large-scale installations, I launched Ugle Ann Electric to put honesty, precision, and a little local flavor back into the trade.

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Generator Install questions, answered by experts

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

It is safe to run a generator continuously, but you must follow safety protocols to ensure personal and home safety. Read the manufacturer’s instructions for specific recommendations, but the general recommendation is to turn generators off overnight or when you’re away from the house. Overworked generators can pose a fire hazard and if your generator is not in a well-ventilated area, running it continuously could lead to carbon monoxide poisoning.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

Costs range from $500 to $2,500, depending on generator type and installation complexity.

The Duncan, OK homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.